LCD temporal and spatial dithering

A technology of time jitter and space, applied in the direction of static indicators, instruments, etc., can solve problems such as artifacts

Inactive Publication Date: 2014-09-03
APPLE INC
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  • Abstract
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Problems solved by technology

However, when combined with the LCD inversion technique discussed above, the use of dithering can lead to visible artifacts on the LCD

Method used

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  • LCD temporal and spatial dithering
  • LCD temporal and spatial dithering
  • LCD temporal and spatial dithering

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Embodiment Construction

[0027] The present disclosure is generally directed to dithering techniques used in conjunction with the two-dot inversion method for LCDs. Dithering techniques can include a combination of spatial and temporal dithering, whereby a small group of pixels or sub-pixels (e.g. a 2×2 frame) can be driven to vary shades of color to simulate an overall desired color, despite the fact that there may be no pixels Or sub-pixels actually display the desired color, and by temporal dithering, the intensities of a small group of pixels or sub-pixels (eg 2×2 frame) can be rearranged frame by frame in this small group of pixels or sub-pixels. This combination of spatial and temporal dithering may include cycling the selected intensity across the small group of pixels or subpixels so that the selected intensity level is always driven by the same voltage, e.g., always positive or always negative, so that Coordinated with various inversion techniques applied to these pixels or sub-pixels, and ca...

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Abstract

A method and system for temporally dithering pixels in a display (14). Dithering of pixels may enable 8-bit color to be simulated by a 6-bit display. Also, the dithering of pixels may be selected to follow a particular pattern to minimize display artifacts that might otherwise arise from conflicts created by performing pixel inversion techniques during pixel dithering. By applying selective dithering techniques, including the use of specific dithering patterns, display artifacts resulting from collisions from pixel inversion techniques during image display can be minimized.

Description

technical field [0001] The present invention generally relates to minimizing the artifacts produced by pixel dithering in a display when such dithering is applied to a display using pixel inversion techniques. Background technique [0002] This section is intended to introduce the reader to various aspects of art, which may be related to various aspects of the disclosure that are described and / or claimed below. This discussion is believed to be helpful in providing the reader with background information useful for better understanding various aspects of the present disclosure. Accordingly, it should be understood that these statements are read in this light, and not as admissions of prior art. [0003] Liquid crystal displays (LCDs) are commonly used as screens or displays for a variety of electronic devices, including consumer electronics such as televisions, computers, and handheld devices (eg, cellular telephones, audio and video players, gaming systems, etc.). Such LCD...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/36
CPCG09G2320/0252G09G3/2055G09G3/3614G09G2340/0428G09G2320/0247G09G2330/021G09G2320/0204G09G3/36
Inventor 齐军陈巍孙武庆尹浩恩仲正中
Owner APPLE INC
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